String Matching

I have a string


Now I have another strings

String str1= "RT";

which should be matched only with RT which is substring of string mainString but not with ORDERTIME which is also substring of string mainString.

 String str2= "RATE" ;

And RATE(str2) should be matched with RATE which is substring of string mainString but not with NETRATE which is also substring of string mainString.

How can we do that ?


Match against "///RT///" and "///RATE///".

This might give you some clues - no where near real code quality, and only a 5 minute job to come with this shoddy solution but does do what you need. it smells lots be warned.

using System;
using System.Collections.Generic;
using System.Collections;
using System.Linq;
using System.Text;

namespace test {
    class Program {
        static void Main(string[] args) {

            Hashtable ht = createHashTable(mainString);

            if (hasValue("RA", ht)) {
                Console.WriteLine("Matched RA");
            } else {
                Console.WriteLine("Didnt Find RA");

            if (hasValue("RATE", ht)) {
                Console.WriteLine("Matched RATE");



        public static Hashtable createHashTable(string strToSplit) {
            Hashtable ht = new Hashtable();
            int iCount = 0;

            string[] words = strToSplit.Split(new Char[] { '/', '/', '/' });
            foreach (string word in words) {

                ht.Add(iCount++, word);

            return ht;
        public static bool hasValue(string strValuetoSearch, Hashtable ht) {

            return ht.ContainsValue(strValuetoSearch);




as far as I understand your question you want to match a string between /// as delimiters. if you look for str you just have to do Regex.Match(mainString, "(^|///)" + str + "(///|$)");

I don't know it will work every time or not.But I have tried this and it works right now in this string matching. I want to know whether this is ok or not,please give me suggestion.

str1 = str1.Insert(0, "///");

bool Result = mainString.Contains(str1);

What about Linq to Object?

String searchTerm = "RT";
String[] src = mainString.split('///');
var match = from word in src where 
            word.ToLowerInvariant() == searchTerm.ToLowerInvariant() 
            select word;

I don't have VS near me so I can't test it, but it should be something similar to this.

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